SOLUTION: In a capture-recapture study, a biologist tagged and released 387 deer. A month later she captured 56 deer, 28 of which had tags. About how many deer were in the population?

Question 454935: In a capture-recapture study, a biologist tagged and released 387 deer. A month later she captured 56 deer, 28 of which had tags. About how many deer were in the population?
Found 3 solutions by jorel1380, edjones, csmarker:
Answer by jorel1380(3719)   (Show Source): You can put this solution on YOUR website!
13/47=274/n
13n=47x274
13n=12878
n=990.61 or about 991 deer..
Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
x/47 = 274/13
x~991
.
Ed
Answer by csmarker(1)   (Show Source): You can put this solution on YOUR website!
28/56 = 387/n
Cross multiply:
28n = 387(56)
28n = 21,672
Divide each side by 28:
n=774
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